@article {48382, title = {Flexible ultracapacitor device fabricated with an organic electrode material- naphthalene diimide nitrile/reduced graphene oxide}, journal = {Journal of Energy Storage}, volume = {56}, year = {2022}, month = {DEC}, pages = {106036}, type = {Article}, abstract = {

In this work, we have demonstrated a high-performance flexible supercapacitor electrode based on reduced graphene oxide (rGO) and naphthalene diimide nitrile (NDI-CN) composite. The rGO/NDI-CN composite was prepared by a simple approach. This composite was well characterized using various techniques such as scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) etc. Besides, the pi -pi stacking of NDI-CN on rGO surface was confirmed using UV-vis and FTIR techniques. As fabricated rGO/NDI-CN composite was examined as an electrode material for the supercapacitor applications. The rGO/NDI-CN electrode has delivered an excellent specific capacitance (C-sp) of 336 F g(-1) at 0.5 A g(-1)current density. The fabricated supercapacitor (SC) displays robustness with 80 \% capacitance retention over 10,000 cycles at higher current density of 10 A g(-1). To further explore the real-world application of electrode materials, the corresponding flexible supercapacitor was designed and examined. The flexible device exhibited an energy density of 9.54 mu Wh cm(-2) at a power density of 0.3 mWcm(-2). These results confirmed that the rGO/NDI-CN electrode material has good potential as an energy storage device. Furthermore, the facile construction and fabrication of flexible device displayed operation of LED when fully charged. The assembled flexible supercapacitor device could be bent and twisted, signifying the potential to be used in practical applications in various high-performance electrochemical devices.

}, keywords = {flexible supercapacitor, Naphthalene diimide, Organic molecule electrodes, pi -pi interaction, rGO}, issn = {2352-152X}, doi = {10.1016/j.est.2022.106036}, author = {Deshmukh, Ashvini B. and Biradar, Madan R. and Pawar, Meenakshi D. and Bhosale, Sidhanath V. and Shelke, Manjusha V.} } @article {48214, title = {MXenes: advances in the synthesis and application in supercapacitors and batteries}, journal = {Journal of Materials Research}, volume = {37}, year = {2022}, month = {NOV}, pages = {3865-3889}, type = {Review}, abstract = {

MXenes, the newest family member of the two-dimensional materials have been widely investigated for different applications, particularly in the energy storage realm. With regard to this, MXene precursors have attained widespread attention for the application in electrochemical energy storage devices especially supercapacitors and batteries. This review has comprehensively studied various synthesis strategies adopted for MXenes including the top-down and bottom-up approaches. The shift to renewable energy alternatives have focused on the electrochemical choices such as supercapacitors and batteries, the most common and relevant ones. Thus the application of MXenes and its composite in supercapacitors as electrodes have been analyzed along with its detailed mechanism and electrochemical performance. Several battery chemistries including lithium-ion, sodium-ion and other battery systems utilizing MXenes have also been discussed here. Thus the existing strategies, advancements, and drawbacks regarding the inclusivity of MXenes in the electrochemical energy systems of supercapacitors and batteries are reviewed in this article.

}, issn = {0884-2914}, doi = {10.1557/s43578-022-00770-4}, author = {Wasnik, Kundan and Pawar, Meenakshi D. and Raphael, Leya Rose and Pullanchiyodan, Abhilash and Shelke, V. Manjusha and Raghavan, Prasanth} } @article {48986, title = {Ti3C2Tx-Nb2Mo3O14 composite as novel anode to realize high power density combined with high stability in a hybrid lithium-ion capacitor}, journal = {Energy Technology }, volume = {11}, year = {2023}, month = {DEC}, type = {Article}, abstract = {

Lithium-ion capacitors (LICs), with their higher energy density at high power capability, stand out as the future generation of energy-storage devices. Herein, the nanocomposite of Ti3C2Tx MXene with Nb2Mo3O14 is prepared by a one-step hydrothermal method and studied as an electrode material for LIC. The asfabricated composite MXene niobium molybdenum oxide (MXNMO) achieves a high reversible capacity of 205 mAh g(-1) at 100 mA g(-1) current density with outstanding cyclability. Further, asymmetric LIC full-cell device composed of MXNMO anode with supercapacitor grade activated carbon as a cathode delivers an energy density of 37.8 Wh kg(-1) (0.25 A g(-1)) and a higher power density of 4244 W kg(-1) (5 A g(-1)) along with the excellent durability showing 85\% capacitance retention over 4000 cycles at 0.5 A g(-1).

}, keywords = {lithium-ion capacitors, MXene, niobium molybdenum oxides, pseudocapacitive anode materials}, issn = {2194-4288}, doi = {10.1002/ente.202300298}, author = {Pawar, Meenakshi D. and Thripuranthaka, Marulasiddappa and Patrike, Apurva and Deshmukh, Ashvini B. and Chaturvedi, Vikash and Krishnan, Arun and Shivade, Rajkiran and Shelke, Manjusha V.} }